Calling UaSrv_FireEvent makes the PLC in service mode

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1

Hi Everyone.

I am trying to execute the UaSrv_FireEvent Function Block but i am calling it within the other function block.

If i execute the UaSrv_FireEvent function block in a program, it works fine but goes to service mode (EXCEPTION Page Fault) when called from inside.

I have also added the AdvIecCheck library to back trace, but it leads me no where.

Any suggestions that can make this work?

Thanks

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image1904×979 409 KB

2

Hello,

Do you call the FUB properly until the Busy is reset to FALSE? Are entries in the Connectivity logger different if you call the FUB in a task or inside another FUB? Could you share implementation details?

3

Hi Pavel,

Here’s the code implementation inside the Function Block -

	4:	UaSrv_FireEvent_0(
			Execute := TRUE, 
			EventType := EventType, 
			EventFieldCount := EventFieldCount,                 
			EventFields := EventFieldsAdr);
		IF NOT (UaSrv_FireEvent_0.Busy) THEN
			UaSrv_FireEvent_0.Execute := FALSE;
			IF (UaSrv_FireEvent_0.Done) THEN
				UaSrv_FireEvent_0(
					Execute := FALSE,
					EventFields := EventFieldsAdr);
					EventFlag := FALSE;
			//	Step := 2;
			END_IF
	END_IF

I need to check the connectivity in the both the scenarios

4

Are you sure the state 4 is executed until the UaSrv_FireEvent_0 finishes its execution?

5

Yes, i have checked it. The function Block’s BUSY is active and DONE is False and it goes to service.

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image1920×1200 401 KB

The attached image is just before it goes to service mode

6

Hello,

I’ve used the OPC UA Project from the Start Page and its SrvFireEvent task, which works as expected.

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image670×505 13 KB

I’ve wrapped the task into a FUB and must confirm that the ArSim goes to the SERV mode as well.

Please contact the local B&R support.

Used versions:

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image495×332 15 KB

7

Thank you for the replies and the efforts.

I will reach out to local B&R Office,.

But is there any workaround that you can suggest for generating the OPC UA events inside the function blocks?